First of all, I will calculate the following questions step by step according to the questions.
1、54.9 + 0.384 + 05 + 37.85 1 + 1.25 + 0.7 + 0.89 + 8.8 + 256
Adding from left to right, we can get:
= 55 + 0.384 + 5 + 37.85 1 + 1.25 + 0.7 + 0.89 + 8.8 + 256
= 55.384 + 5 + 37.85 1 + 1.25 + 0.7 + 0.89 + 8.8 + 256
= 60.384 + 37.85 1 + 1.25 + 0.7 + 0.89 + 8.8 + 256
= 98.235 + 1.25 + 0.7 + 0.89 + 8.8 + 256
= 99.485 + 0.7 + 0.89 + 8.8 + 256
= 100. 185 + 0.89 + 8.8 + 256
= 10 1.075 + 8.8 + 256
= 109.875 + 256
= 365.875
Therefore, 54.9+0.384+05+37.851+1.25+0.7+0.89+8.8+256 = 365.875.
Addition is a basic mathematical operation. For any two numbers A and B, their sum can be expressed as a+B, such as a = 3 and b = 5, and their sum is 3+5 = 8. If there are more numbers to add up, add them up one by one, such as 1+2+3+4 = 10.
Matters needing attention in mathematical operation
1. Symbol Usage: Use the plus sign (+), minus sign (-), multiplication sign (× or *) and division sign (÷ or/) correctly.
2. Operation sequence: In polynomial calculation, multiplication and division have higher priority than addition and subtraction. If you are not sure, you can use parentheses to clarify the operation order.
3. Decimal point position: Decimal point position is very important, and wrong decimal point position may lead to completely different answers.
4. Check the calculation: Even if you have mastered the basic mathematical operations, you still need to check your own calculations to ensure that common mistakes, such as clerical errors or calculation errors, are avoided.
5. Pay attention to units: In some cases, you need to pay attention to units, such as time units, length units, unit of volume, etc. , especially when changing from one unit to another.